The Tripolarities feature three tall, slender, glass-fibre/polyester poles, arranged so that the points where they are fixed to the ground form an equilateral triangle. The poles are painted with bands of bright, saturated colour, separated at intervals by darker, more sombre colour. The colours are varied and spaced so the eye is drawn up and down the three poles in a spiralling, zig-zag motion. As the poles move in the wind, a viewer sees colours moving across a background, the movement producing a constant alteration in the colours’ brightness and hue. As one point of an equilateral triangle, each pole remains the same physical distance from the other two. But a viewer never perceives the spaces in between to be the same. The stability of the triangular spacing could only be established from above–an angle that would render the poles invisible.